I’ve been experimenting with the common two-transistor driver design with great sucess , but it needs VDC, and i want to keep the design as simple as possible as i want to build two small standalone HV displays a Jacob Ladder and a Plasma Globe, both working fine already. Similar Threads Mains powered buck driver. All projects are for noncommercial use only. Entire driver assembled in case. The first one is particularly interesting to me; a dimmer and a capacitor in series with the coil – as simple as it gets.

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I can’t measure it, of course, but it’s clearly making shorter arcs. You’ll need to choose a username for the site, which only take a couple of moments here. Fewer powersd mean higher voltage, but increased mosfet power dissipation. To obtain a high frequency variable duty cycle drive signal we can use the timer. So, i came along this site http: Ask a Question Want to reply to this thread or ask your own question?

The schematic of a flyback converter can be seen in Fig.

Flyback converter

A variation in primary-side sensing technology is where the output voltage and current are regulated by monitoring the waveforms in the auxiliary winding used to power the flyvack IC itself, which have improved the accuracy of both voltage and current regulation.


This was before I knew anything about electricity, so 5V was all I considered safe for the driver. Both powereed a signal related to the output voltage. This topology is now replacing ringing choke converters RCCs in applications such as mobile phone chargers.

Flyback converter – Wikipedia

The auxiliary primary winding is used in the same discharge phase as the remaining secondaries, but it builds a rectified voltage referenced commonly with the primary DC, hence considered on the primary side.

Flybqck is equivalent to that of a buck-boost converter[1] with the inductor split to form a transformer. Flyback driver for Jacob’s Ladder? In other projects Wikimedia Commons.

Use a timer tester circuit. This is a pretty standard astable design. Website layout by Elinorand Eirik Taylor, After that, you can post your question and our members will help you out.

Make sure you use a mosfet and not a bipolar junction transistor, the symbol in the datasheet should resemble the one in the schematic. Since some energy is avalanched in the mosfet, adequate heatsinking of the IRFP is required.

Flyback Transformer Drivers

You can check for a frequency by replacing the flyback with a speaker. There are three common ways to generate this voltage. From Wikipedia, the free encyclopedia. Always check that the is still functioning.


As mentioned above this driver drives the flyback in flyback mode. However, this is not possible since the primary has significant inductance. If you get a high pitched whine it’s alive. You must log in or sign up to reply here. Previously, a measurement was taken across the whole of the flyback waveform which led to error, but it was realized that measurements at the so-called knee point when the secondary current is zero, see Fig.

The ground pin can be found by finding the pin the HV arcs to the most.

All parts except the timer and mosfet are non-critical. This was before it was upgraded into the Multipurpose Inverter.

The current then causes the voltage at the mosfet drain to increase in an attempt at allowing current to fllyback.

Wikimedia Commons has media related to Flyback converters.

It should be around 1 ohm.